Speed-controller for spinning-frames.



W. T. HOLMES & G. H. WHITTINGHAM. SPEED CONTROLLER FOR SPINNING FRAMES.

APPLICATION FILED 0013,1910.

1,@75,036. Patented Oct. 7, 1913.

. Migmg J6 vf AL mmaumt llldllTElD TAT FATENT h h lfi,

WILLIAIVI T. HOLMES, OF BALTIMORE, AND GEORGE Bl. WHITTINGHAIVE, OF PIKESVILLE,

MARYLAND, ASSIGNOES TO MONITGR MANUFACTURING: COI-KPANY, OF BALTIMORE, MARYLAND, A CORPGBATION OF MARYLAND.

SPEED-CONTRQLLER FOR SPINNING-FRAIIIES.

Application filed. October 3, 1919.

To all whom it may concern:

Be it known that we, W ILLIAM T. HOLMES and GEORGE E. lvrirrrrnoinmi, citizens of the United States, residing, respectively, at Baltimore and Pikesville, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Speed-Controllers for Spinning Frames, of which the following is a specification.

This invention relates to speed controlling means for spinniu machines whereby the speed of the bobbins is automatically increased as the bobbins build up.

In carrying out our invention we provide an electric motor, connected to the drum shaft of the spinning machine, in any suitable way, in order to drive the same, and a rliezrstat or controller arranged in circuit with the motor, and we connect the controller-arm with a part on the builder-arm which is automatically adjusted toward the fulcrum of the builder arm, to shorten the throw of the ring-rail as the bobbins build up, whereby the'controller arm is moved automatically to increase the speed of the motor and the bobbins as the path of movement of the ring rail shortens. The increase in speed of the bobbins is desirable, in order to increase the efficiency of the spinning machine, and it is feasible because of the well known fact that, owing to the gradual change in the angle of delivery of the yarn from the traveler to the bobbins, the stress upon the yarn decreases as the bobbins fill up.

In the accompanying drawing, Figure 1 is a front elevation of a portion of a spin ning machine with the motor and rheostat connected thereto; and, Figv 2 is a side view of the builder arm, showing also the chain connection to the rheostat arm and illustrating the electrical connections of the rheostat and motor.

Referring to the drawing, 1 indicates the ring-rail of a spinning machine, 2 one of the bell-cranks for operating the same and it. indicates the builder-arm and mechanism thereon connected by the chain 3 to the bellcranks. The chain 8 is secured to one end of an arcuate slide or rack 4, which is movable in arcuate guideways 5 on the free end of the builder-arm, the center of curvature of said rack and guideways being at the center Specification of Letters Patent.

Patented Got. 7, 1913.

Serial No. 585,043.

of the sheave 6 over which the chain 3 extends. The rack or slide has teeth 4 which mosh *ith a worm 7 upon a pick shaft 8. which shaft is provided with the usual ratchet wheel 9, adapted to be turned the distance of one or several teeth, as desired, by a stationary pawl 10, at each reciprocation of the builder-arm 11, which arm is operated in the usual way by a heart-shaped cam 12.

The details of the builder mechanism form no part of our invention and therefore need not be further described. it is well known in the art that the function of this mechanism is to automatically cause a shortening of the throw of the ring-rail as the bobbins build up, and that one way of accomplishing this end is through the medium of a. pick shaft and worm wheel which move a slide, such as the slide 4, to which the chain 3 is attached, toward the fulcrum of the builder arm as the bobbins build up.

To the slide or rack 4 we connect a cord or chain 13 which is extended around a suitable pulley 13 adjacent to the fulcrum of the builder lever and from thence the cord extends to the arm 14 of a rheostat or controller It. This rheostat, as shown in the drawing, is arranged in circuit with the field coil f of an electric motor M, the armature of which is connected to the drum shaft D which drives the spindles of the spinning machine. The arm 14, in the drawing, is biased toward that position in which all of the resistance 1" is included in the field of the motor, by a spring 15, and in Fig. 1 the arm is shown retracted by the spring so as to include the resistance in the shuntfield circuit and operate the motor at its highest speed. This is the position which the arm occupies when the bobbins are about filled. Before commencing to wind a set of bobbins, the slide 4 is set forward on the builderarm, and the controller arm 14 moves with it to exclude all of the resistance from the field of the motor, as shown in Fig. 2, to 'operate the motor at its lowest speed. As the bobbins build up the slide 4 is gradually moved rearward, through the medium of the pick shaft and worm, thereby allowing the spring 15 to gradually move the controller arm 14 to insert resistance in the field of the motor and thereby increase its speed gradually as the bobbins build up and the V resistance from the field circuit of the motor so, that when the operation of filling the next set of bobbins is commenced the motor Will operate at its lowest or normal speed, and will then gradually increase in speed, as before, as the bobbins build up.

The: circuit connections for the motor, as shown in the diagram, are, from one line wire, marked I through conductor 16 and starter 17 to the armature a, thence through conductor 18 to theopposite supply wire marked The field circuit extends from the supply wire marked through conductor 19, controller arm 14%, resistance r (when the latter is in circuit), conductor 20' and field winding f to the conductor 18 and V thence to the supply Wire marked l/Vhile we prefer to use a shunt wound direct current motor with a resistance in the field circuit, we may use any other suitable type of motor with a controllerfor varying its speed, the controller arm being biased toward one of its extreme positions by a spring or gravity and connected mechanically to a part of the builder mechanism which is automatically adjusted by the pick shaft to shorten the throw ofthe' ring-rail, so that the controller arm will move with said part from one of its extreme positions to the other to give the desired variations in speed.

7 What we claim is:- v

1. The combination with the drum shaft of a spinning machine, and the builder mechanism comprising a builder arm and a part adjustable thereon toward the fulcrum of the arm to shorten the throw of the ringrail-as the bobbins build up, of an electric Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner Washington, D. C.

member biased toward one of its extreme po.

sitions and a flexible connection extending from said part to approximately the pivotal axis of the arm and thence to said member, whereby the latter may be moved to its other extreme position by the movement of said part. 7

2. The combination with the drum shaft of a spinning machine, and the builder mechanism comprising a builder arm and a part adjustable thereontoward the fulcrum of the arm to shorten the throw of the ringrail as the bobbins build up, of an electric motor for driving the drum shaft, said motor having shunt field windings, a rheostat for the shunt field circuit, said rheostat having a contact member biased toward one of its extreme positions, a flexible connection extending from said part to approximately the pivotal axis of the arm and. thence to said member, whereby the latter may be moved to its other extreme position by the movement of said part.

8, The combinationwith the drum shaft and builder armgof a spinning machine, of a slide on said arm, means for gradually adtion, and a flexible connection extending from the slide to the pivotal axis of the arm and thence to said member.

i In testimony whereo-fwe afiix our signatures-in presence of two witnesses WILLIAM T. HQLMES. GEORGE WHIITIN Gil-1AM.

lVitnessesr i e 7' FRIEDA ERNST,

HERTHA ERNs r.

of Patents, 

